Foueth to john champion



(No Model.)

H. F. KEEN.

GAP FOR GHIMNEYS AND SMOKE STAGKS. No. 818,749. Patented May 26, 1885..

Fla

ATENT OFFICE.

HORACE F. KEEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- FOURTH TO JOHN CHAMPION, OF SAME PLACE.

CAP FOR CHIMNEYS AND SMOKE-STACKS.

SPECIFICATION forming part of Letters Patent No. 318,749,6ated May 26, 1885.

Application filed August 4,1884. (No model.)

To all whom it may concern:

Be it known that I, HORACE F. KEEN, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Caps for Chimneys and Smoke-Stacks, of which the following is a specification.

The object of my invention is to so 0011- struct a chimney cap or ventilator as to pro- IO mote the draft, prevent downdraft, and provide for the direct escape of the products of combustion when required; and this object I attain in the manner hereinafter set forth, reference being had to the accompanying drawings, in which- Figure 1 is a vertical section of my improved chimney-cap; Fig. 2, a sectional plan on the line 1 2; Fig. 3, a section of the upper portion of the cap with the cover elevated for direct draft, and Fig. 4 asection of a modified form of directdraft device.

A is the tubular casing of the cap, constructed for adaptation to a chimneytop or stove-pipe.

Within the upper portion of the casingA is a conical tube, B, secured to the casing at the lower edge, and forming, with the said casing, an annular chamber, a, communicating at the lower end through openings b in the 0 casing with the space beneath a flaring deflector, l), on the outside of said casing.

Inside the tube B, and terminating some distance below the top of the same, are a series of fines, F, also communicating through 5 openings d with the space beneath the deflector D. V

Surrounding and extending some distance above the top of the casing A is a hood, G, open at the bottom, and having side openings,

f, but provided at the top with a cover, J, having projections t, with right-angled slots m, for the reception of pins a on the hood. hen the cap is in place on the chimney or stove-pipe, air from the windward side passes 5 under the deflector and is directed thereby to the openings 1) d and into the chamber a and lines F, which it ascends, and on escaping from the top of the same increases the draft by serving as an ejector. Air also passes up under the hood, and, blowing over the top of the casing A, directs the products of combustion to the leeward side of the cap, where they escape from beneath the hood and through the openings f therein, as indicated by the arrows. Some of the products of combustion may pass down through the chamber a and escape from the openings 2) on the leeward side of the casing, and in order to prevent the incoming and outgoing currents from interfering with each other, the chamber a, and also the annular chamber h, between the casing A and hood G, are divided by a series of annular partitions, on, into independent flues, as shown in Fig. 2. Downdrafts are prevented by the closed cover J; but when no air is stirring, and it is desired to 1123 6 as free a draft as possible, said cover is raised, as shown in Fig. 3, so as to permit the direct escape of the products of combustion.

A cap having a damper-ring with openings 20, as shown in Fig. 4, may replace the vertically-movable cap J, if desired, the openings w coinciding with openings 10 in the hood when a direct draft is required.

I claim as my invention-'- 1. The combination of the casing A, the external hood, G, extending above the same, and of greater diameter than the said casing, so as to form a dischargepassagc, H, around the same, and the cap or cover J, adjustable so as to provide an opening above the hood for a direct draft, as set forth.

2. The combination of the casing A, having openings 1) and d, the internal tube, B, and fines F,and the external hood, G, extending above the casing, as set forth.

3. The combination of the casing A, having openings 1) and d, the external hood, G, extending above the casing, the internal tube, B, and fines F, and the deflector D, as specified.

4. The combination of the casing A, having openings I), theinternal tube, 13, external hood, G, extending above the casing, and the partitions x, between the hood G and the casing and between the latter and the tube 13, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HORACE F. KEEN.

Witnesses:

JOHN M. CLAYTON, HARRY SMITH. 

